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單項(xiàng)選擇題

（）extinguish oil and electrical fires with water.

A.Do
B.Did
C.Never
D.Isn’t

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單項(xiàng)選擇題

（） fire doors, windows, hatches, accesses and ventilators.

A.Closed
B.Close
C.Closing

單項(xiàng)選擇題

Inform the bridge and give the alarm at once （）the fire.

A. in case
B. case of
C. in case of
D. in the case of